Network Masks - Big Idea #4 Some Address Space Rules

This is part 4 of 4 covering some big ideas in network masking.

For more information and examples with masking:

Intro to Masking: https://youtu.be/HvDFMNWNu0Y
Subnetting Part 1: https://www.youtube.com/watch?v=e_sTEj9sqUI
Subnetting Part 2: https://www.youtube.com/watch?v=jHvOdPwj5l0
Subnetting Part 3: https://www.youtube.com/watch?v=SMRd_kDdXuw
Masks and CIDR: https://youtu.be/S8fcDQoIOm8
Subnets and Supernets: https://youtu.be/34piXBprhOE